signonservlet.java

使用jsp+Servlet,采用MVC模式,实现了一典型小型电子商务网站的全过程.包括前台和后台的全部功能.适合于初学者学习使用.

package com.eshop.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.eshop.service.AccountService;

public class SignonServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public SignonServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("gbk");
		boolean success=false;
		String userid=request.getParameter("userid");//从表单获得userid
		String password=request.getParameter("password");//从表单获得密码
		AccountService accountService=new AccountService();
		success=accountService.signon(userid, password);//进行用户名和密码验证
		int status=accountService.getUserStatus(userid, password);//根据用户名和密码获得用户状态
		if(success){
			//如果用户名和密码正确,将userid和password存入Session并跳转到categoryList
			HttpSession session=request.getSession();
			session.setAttribute("userid", userid);
			session.setAttribute("password", password);
			if(status==1){
				RequestDispatcher requestDisptcher=request.getRequestDispatcher("../manager/mainFrame.jsp");
				requestDisptcher.forward(request, response);
			}
			if(status==0){
				RequestDispatcher requestDisptcher=request.getRequestDispatcher("/categoryList");
				requestDisptcher.forward(request, response);
			}	
		} 
		else{
			//如果用户名和密码错误,则提示信息,并返回login.jsp
			request.setAttribute("errorMessage","请输入正确的用户名和密码！");
			RequestDispatcher requestDisptcher=request.getRequestDispatcher("login.jsp");
			requestDisptcher.forward(request, response);
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}